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-- > 壓不掉 : RBC extravasation 到 vessel 外
-- > 壓的掉 : RBC 還在血管裡
- 壓不掉 + 摸不到 : Thrombocytopenia, Coagulopathy ( 若很大片 )
DIC, TTP, Fat emboli
- 壓不掉 + 摸的到 : Vasculitis
Acute meningococcal, Gonococcal
- 壓的掉 + 摸不到 : 代表是發炎性血管擴張, 沒有真的出血 ---> 藥物疹, Infection
- 壓的掉 + 摸的到 : Vascular tumor ( Haemangioma )
* 小麻 purpura, petechiae, ecchymosis 基本定義就是 壓不掉 !!
( three descriptive types of bleeding into the skin )
再分成 :
- Non palpable : Thrombocytopenia, DIC, TTP
- Palpable : Vasculitis, meningococcemia
- Petechia 點狀出血 : 1~2 mm
- Thrombocytopenia, DIC
- Meningococcemia
- Vasculitis
- Viral infection
- Leukemia
- Purpura 紫斑:2~10 mm
- Henoch-Schönlein purpura
- ITP ( Idiopathic thrombocytopenic purpura )
- Gonococal
- Meningococcal
- Ecchymosis 瘀斑 : 10~20 mm 一大片
Vasculitis :
- Infection : esp Virus
- Immune :
- HS purpura, PAN
- Wegener, Churg- Strauss, Microscopic polyarteritis
- Goodpasture, Kawasaki - Unknown :
- Temporal arteritis
- Takayasu arteritis
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